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Journal articles on the topic 'Percentage degradation'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Journal, Baghdad Science. "Degradation of Dazomet by Thermal Fenton and Photo-Fenton Processes under UV and Sun lights at Different Temperatures." Baghdad Science Journal 15, no. 2 (2018): 158–68. http://dx.doi.org/10.21123/bsj.15.2.158-168.

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In this research, the degradation of Dazomet has been studied by using thermal Fenton process and photo-Fenton processes under UV and lights sun. The optimum values of amounts of the Fenton reagents have been determined (0.07g FeSO4 .7H2O, 3.5µl H2O2) at 25 °C and at pH 7 where the degradation percentages of Dazomet were recorded high. It has been found that solar photo Fenton process was more effective in degradation of Dazomet than photo-Fenton under UV-light and thermal Fenton processes, the percentage of degradation of Dazomet by photo-Fenton under sun light are 88% and 100% at 249 nm and

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Gopika, V. C., M. S. Hisana, V. Jayakrishnan, et al. "Degradation study of Doxycycline in bulk and formulation by UV-Visible spectrophotometry." World Journal of Biology Pharmacy and Health Sciences 15, no. 2 (2023): 067–73. https://doi.org/10.5281/zenodo.10676996.

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<strong>Introduction:</strong> Forced degradation is a process that involves degradation of drug products and drug substances at condition more severe than accelerated conditions and thus generates degradation products that can be studied to determine the stability of the molecule. <strong>Aim and objective: </strong>To investigate the forced degradation study for the determination of degradation of Doxycycline by UV-Visible spectrophotometric method. <strong>Methods: </strong>Doxycycline sample and standard were exposed to different stress conditions (hydrolytic and oxidative d

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Hameed, Israa Majeed, and Aswan H. Bayar2. "GERMINATION EFFECT ON GLIADIN DEGRADATION IN SOUR DOUGH BREAD." iraqi journal of market research and consumer protection 16, no. 2 (2024): 267–76. https://doi.org/10.28936/jmracpc16.2.2024.(23).

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The effect of the germination process on the decomposition of gliadins in Sour dough bread was studied. The use of sprouted wheat flour and sprouted Triticale flour in the manufacture of sour bread was tested and compared to unsprouted wheat and Triticale. Also, Lactobacillus plantarum starter was used in each of the four treatments, and the percentage of gliadins in each treatment was estimated using Elisa method so the percentage of gliadins in wheat flour before adding the starter culture was 17.83%, after adding the starter culture at a rate of 1%, there was a decrease in gliadins by 25%.

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Guggari, Geetanjali S., S. Shivakumar, G. A. Manjunath, et al. "Thermal and Mechanical Properties of Vinyl Ester Hybrid Composites with Carbon Black and Glass Reinforcement." Advances in Materials Science and Engineering 2021 (September 21, 2021): 1–7. http://dx.doi.org/10.1155/2021/6030096.

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The objective of the work is to investigate both thermal and mechanical properties of vinyl ester/glass composites incorporated with different percentages of carbon black reinforcements through experimental approaches. Analysis of glass transition temperature, thermogravimetric analysis (TGA), degradation temperature, hardness, flexural strength, etc. is performed using differential scanning calorimeter, X-ray diffraction, tensile machine, and flexural machine, respectively. The scanning electron microscope was used for surface fracture studies. The degradation temperature reduces initially wi

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Zilfa, Z., Yulizar Yusuf, and Alsa Sepia Putri. "Penanggulangan Limbah Ubi Kayu dengan Menggunakan Katalis TiO2/Zeolit Alam Clinoptilolit-Ca secara Sinergi Fotokatalis dan Adsorpsi." Jurnal Kimia Unand 13, no. 1 (2024): 14–21. http://dx.doi.org/10.25077/jku.13.1.14-21.2024.

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Cassava waste containing cyanogenic glycosides is very dangerous for the environment because there is cyanide bound to organic compounds. Cyanide bound to organic compounds is degraded by photolysis using TiO2 catalyst/Clinoptilolite-Ca natural zeolite to break the bond between HCN and organic compounds so that it is no longer harmful to the environment, besides that cassava waste also contains suspended solids and organic compounds that affect water quality, resulting in high COD, BOD, TOC, and TSS values in waters. Therefore, the values of COD, BOD, TOC, and TSS were determined before and af

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Safni, Umiati Loekman, Fitra Febrianti, Maizatisna, and Tadao Sakai. "DEGRADASI ZAT WARNA SUDAN I SECARA SONOLISIS DAN FOTOLISIS DENGAN PENAMBAHAN TiO2-ANATASE." Jurnal Riset Kimia 1, no. 2 (2015): 163. http://dx.doi.org/10.25077/jrk.v1i2.67.

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ABSTRACT Degradation of Sudan I dye had been done with sonolysis and photolysis by adding anatase-TiO2. Sonolysis method were performed using an ultrasound with frequency of 45 kHz. Photolysis method were performed using an irradiation of UV light with λ = 359 nm. Degradation of 4 mg/L Sudan I with addition of 0.1000 g anatase-TiO2 at pH = 7.0, temperature 25 ± 1°C, percentage of degradation 64.04% within 180 minutes sonolysis. Degradation of 4 mg/L Sudan I using photolysis with addition of 0.1000 g anatase-TiO2 at pH = 7.0 and percentage of degradation 100% within 180 minutes photolysis. Degr

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Bebawy, Lories I., Mohammed F. El Tarras, and Samah A. El Sabour. "Determination of Trimetazidine Dihydrochloride in the Presence of Its Acid-Induced Degradation Products." Journal of AOAC INTERNATIONAL 87, no. 4 (2004): 827–33. http://dx.doi.org/10.1093/jaoac/87.4.827.

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Abstract Three methods are presented for the determination of trimetazidine dihydrochloride in the presence of its acid-induced degradation products. The first method was based on measurement of first-derivative D1 value of trimetazidine dihydrochloride at 282 nm over a concentration range of 8.00–56.00 μg/mL with mean percentage accuracy of 99.80 ± 1.17. The second method was based on first derivative of the ratio spectra DD1 at 282 nm over the same concentration range with the percentage accuracy of 99.14 ± 0.68. The third method was based on separation of trimetazidine dihydrochloride from

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Yenni, Neila, Safni Safni, and Hamzar Suyani. "DEGRADASI SENYAWA PARAQUAT DALAM PESTISIDA GRAMOXONE® SECARA SONOZOLISIS DENGAN PENAMBAHAN TiO2-ANATASE." Jurnal Riset Kimia 3, no. 2 (2015): 145. http://dx.doi.org/10.25077/jrk.v3i2.58.

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ABSTRACT Degradation of Paraquat compound in Gramoxone pesticide had been done by sonolysis, ozonolysis, and sonozolysis. Sonolysis methods were performed using an ultrasound VC-1, ozonolysis using a bio-ozone space age sterilizer, and sonozolysis by combining sonolysis and ozonolysis methods. The optimum condition for degradation of 4 mg/L paraquat by sonolysis was found at temperature 40±1°C. Percentage of degradation at optimum condition was 22.80% with 90 minutes treatment. Whereas, with using ozonolysis method percentage of degradation of paraquat 4 mg/L was 50.39% with 60 minutes treatme

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Yuliasari, Nova, Amri Amri, Risfidian Mohadi, Elfita Elfita, and Aldes Lesbani. "Catalytic Activity of LDH-TiO2 and LDH-ZnO in Photodegradation of Procion Red." Science and Technology Indonesia 8, no. 2 (2023): 252–58. http://dx.doi.org/10.26554/sti.2023.8.2.252-258.

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Pristine layered double hydroxides (LDHs) which have been modified into LDHs-metal oxide composite were applied as procion red (PR) photodegradation catalysts. The preparation was performed using a low calcination temperature of 300°C. Optimization variations include pH, catalyst weight and catalysis time. The degradation percentages of Mg/Al LDH, Mg/Al-TiO2 and Mg/Al-ZnO were 51.8%, 72.0% and 89.5%, respectively. The percentage of degradation of Zn/Al LDH, Zn/Al-TiO2 and Zn/Al-ZnO were 44.0%, 61.2% and 58.4%, respectively. The study results showed that all composites produced a greater percen

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Nik Yusoff, Nik Raihan, Siti Norsyamiemi Mazlan, Rozidaini Mohd Ghazi, Musfiroh Jani, and Nik Nurul Anis Nik Yusoff. "Photocatalytic degradation of glyphosate using TiO₂/Al₂O₃ using Box-Behnken Design." BIO Web of Conferences 131 (2024): 05002. http://dx.doi.org/10.1051/bioconf/202413105002.

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The TiO2/Al2O3 photocatalyst was produced through a hydrothermal process. The experiment was based on Box-Behnken design (BBD) considering three factors with three levels. A total of 17 experiments were designed and conducted to study the effect of variables such as TiO2/Al2O3 photocatalyst ratio (50:50 - 90:10), TiO2/Al2O3 photocatalyst amount (1.0 g – 40.0 g), and initial concentration of glyphosate (5.0 - 10.0 mg/L) on the percentage of degradation. Glyphosate degradation was conducted under UV light for three hours and monitored using a UV-Vis spectrophotometer (DR6000 HACH). Regression an

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Shetty, K. V., M. R. Kedargol, and G. Srinikethan. "Combined effect of plate pulsation parameters and phenol concentrations on the phenol removal efficiency of a pulsed plate bioreactor with immobilized cells." Water Science and Technology 58, no. 6 (2008): 1253–59. http://dx.doi.org/10.2166/wst.2008.354.

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Continuous aerobic biodegradation of phenol in synthetic wastewater with phenol at different concentrations (200, 300, 500, 800 and 900 ppm) was carried out in a pulsed plate column, which is used as a bioreactor with immobilised cells of Nocardia hydrocarbonoxydans (NCIM 2386) at a dilution rate of 0.4094 h−1 and amplitude of 4.7 cm at various frequencies of pulsation (0, 0.25, 0.5, 0.75 and 1 s−1). The effect of frequency of pulsation on the steady state performance of the bioreactor for phenol biodegradation at different influent concentrations was studied. Percentage degradations were obse

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Pistor, Vinicios, Felipe G. Ornaghi, Heitor L. Ornaghi, and Ademir J. Zattera. "Degradation kinetic of epoxy nanocomposites containing different percentage of epoxycyclohexyl-POSS." Polymer Composites 33, no. 7 (2012): 1224–32. http://dx.doi.org/10.1002/pc.22181.

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Prabhakaran, S. P., R. Santhosh Kumar, J. Jaganath, B. Naveena, and P. Gomathi Priya. "Biodegradation Studies on Phenolic Compounds." Advanced Materials Research 584 (October 2012): 455–59. http://dx.doi.org/10.4028/www.scientific.net/amr.584.455.

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The removal of phenolic compounds in effluents is major problem in industries. Degradation of phenolic compounds using co-culture microbial species along with individual specimens was studied. The COD reduction percentage showed a better degradation with co-culture. The degradation with microbial concentration as function of time was studied and shown an effective degradation with growth of microbial species on the fifth day. Parameters such as pH, temperature, ion sources for aerobic degradation are analyzed. Improving biomass growth and COD removal percentage of the co-culture showed a bette

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Pathak, T. K., N. H. Vasoya, Thillai Sivakumar Natarajan, Kunal B. Modi, and Rajesh J. Tayade. "Photocatalytic Degradation of Aqueous Nitrobenzene Solution Using Nanocrystalline Mg-Mn Ferrites." Materials Science Forum 764 (July 2013): 116–29. http://dx.doi.org/10.4028/www.scientific.net/msf.764.116.

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MgxMn1-xFe2O4(x = 0.0, 0.2, 0.4, 0.5, 0.6 0.8 and 1.0) spinel ferrite system was synthesized by the chemical co-precipitation route. Subsequent characterization of synthesized Mg-Mn ferrites was carried out by X-ray powder diffraction and transmission electron microscopy to study the structural and textural properties of photocatalysts. Porosity, surface area and equivalent surface free energy of different Mg-Mn ferrite photocatalysts were calculated. The photocatalytic activity of synthesized photocatalysts was evaluated by degradation of nitrobenzene in aqueous medium under ultraviolet light

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Moustafa, Nadia M., Amr M. Badawey, Nesrine T. Lamie, and Abd El-Aziz B. Abd El-Aleem. "Stability-Indicating Methods for the Determination of Erdosteine in the Presence of its Acid Degradation Products." Journal of AOAC INTERNATIONAL 97, no. 1 (2014): 86–93. http://dx.doi.org/10.5740/jaoacint.11-202.

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Abstract Four accurate, sensitive, and reproducible stability-indicating methods for the determination of erdosteine in the presence of its acid degradation products are presented. The first method involves processing the spectra by using a first-derivative method at 229 nm in a concentration range of 10–70 μg/mL. The mean percentage recovery was 100.43 ± 0.977. The second method is based on ratio-spectra first derivative spectrophotometry at 227.4 and 255 nm over a concentration range of 10–70 μg/mL. The mean percentage recovery was 99.65 ± 1.122% and 100.02 ± 1.306% at 227.4 and 255 nm, resp

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Aulia, Wenti, and Hary Sanjaya. "Degradasi Zat Warna Rhodamin B menggunakan Katalis TiO2 dengan Metode Fotosonolisis." Periodic 12, no. 2 (2023): 54. http://dx.doi.org/10.24036/periodic.v12i2.118004.

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Research has been carried out on the degradation of Rhodamine B dye with TiO2 as a catalyst using the photosonolysis method. The purpose of this study was to determine the optimum time and optimum mass of the TiO2 catalyst used to degrade rhodamine B. The results of the percentage degradation of rhodamine B were obtained from the absorbance value measured using a UV-Vis spectrophotometer. The maximum wavelength of rhodamine B obtained from the measurement of the UV-Vis spectrophotometer is 553.8 nm. The results showed that the optimum time to degrade rhodamine B was 210 minutes with a degradat

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Arfi, Febrina, Safni Safni, and Zaimi Abdullah. "DEGRADASI SENYAWA PARAQUAT DALAM PESTISIDA GRAMOXONE SECARA SONOLISIS DENGAN PENAMBAHAN ZnO." Lantanida Journal 3, no. 1 (2017): 71. http://dx.doi.org/10.22373/lj.v3i1.1442.

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Degradation of paraquat in gramoxone pesticide had been done by sonolysis with adding ZnO. Sonolysis method were performed using an ultrasound with frequency 50 kHz. The optimum condition of sonolysis were found at temperature 40oC. The percentage of degradation of 20 mg/L paraquat by sonolysisi method without adding ZnO during 120 minutes treatment was 20,70%, and with adding0,08 g percentage of degradation increasesd to 56,83% at the same treatment.

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Safni, Safni, Eno Okta Patricia, Trisna Ollinovela, and Yulizar Yusuf. "Degradation of Phenol Using Sonolysis and Photolysis by TiO2/RHAC Catalyst and Analysis with Spectrophotometer UV-VIS and HPLC." al-Kimiya 10, no. 1 (2023): 50–56. http://dx.doi.org/10.15575/ak.v10i1.24775.

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This study focuses on the degradation of phenol in aqueous solutions using photolysis and sonolysis methods. It investigates the impact of catalyst mass, types of light (UV-A, UV-C, and visible light), types of catalyst (RHAC, TiO2, and TiO2/RHAC), and processing time on phenol degradation. The phenol solutions are analyzed before and after degradation using Spectrophotometer UV-Vis and HPLC. The research aims to understand the factors influencing phenol degradation and provide a basis for further studies to enhance the efficiency of phenol removal. Results show significant improvements in deg

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Moktadir, SMG, MU Talukder, AKO Huq, MA Gafur, and AMS Chowdhury. "Coir Fiber Reinforced Polypropylene Composites: Eco-friendly Byproducts." Journal of Environmental Science and Natural Resources 10, no. 1 (2017): 61–64. http://dx.doi.org/10.3329/jesnr.v10i1.34695.

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Coir fiber (CF) reinforced polypropylene (PP) composites were fabricated using an extruder machine. The fiber contents were varied 5 to 20% and physico-mechanical properties as well as bio-degradability were also tested. Ultimate tensile strength and flexural strength decreases with the increases of percentages of fiber addition. Lowest percentage elongation is observed at 20% CF+PP composite which are rigid in nature. Leeb rebound hardness also decreases with the increase of percentage of raw fiber addition. The bio-degradation of different percentage of CF and PP composites in soil and salin

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Dan, Guo, Zhi Hong Zhang, Xin An Zeng, et al. "Synergetic Effects of Pulsed Electric Field and Ozone Treatments on the Degradation of High Molecular Weight Chitosan." International Journal of Food Engineering 10, no. 4 (2014): 775–84. http://dx.doi.org/10.1515/ijfe-2014-0100.

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Abstract A synergetic method integrating both pulsed electric field (PEF) and ozone treatment was developed as a novel approach to investigate the degradation of high molecular weight chitosan (Mw=4.5×105 Da). A device integrating both components was designed and assembled for the experiments. Results showed that the highest degradation percentage of chitosan was achieved with PEF/ozone co-treatment generated at experimental conditions of 1.2 L/min of ozone flow rate, 100 mL/min of 0.6% (w/v) chitosan solution flow rate, and 26.7 kV/cm of PEF intensity. The degradation percentage after 60 min

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Okeniyi, O. O., O. A. Adekunle, O. A. AJAYI, T. K. BELLO, S. O. Okeniyi, and Y. M. SANI. "OVAT DEGRADATION ANALYSIS OF METHYLENE BLUE USING RICE HUSK ASH (AGRO-WASTE) BASED CATALYST IN SOLAR IRRADIATION." JOURNAL OF THE NIGERIAN SOCIETY OF CHEMICAL ENGINEERS 36, no. 2 (2021): 1–9. http://dx.doi.org/10.51975/21360201.som.

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This study investigated the degradation of methylene blue dye with ZnO-CuO/RHA, a synthesised agro waste-based photocatalyst under solar irradiation at ambient temperature. Preliminary screening of the methylene blue degradation facilitated the selection of the best ZnO-CuO/RHA combination. The photocatalytic degradation was done by taking varying weights of catalyst in 100 mL of dissolved 10-30 ppm MB solutions. The sample was magnetically stirred at 500 rpm in darkness before being exposed to sunlight irradiation. The suspension was magnetically stirred continuously and 5 ml was withdrawn in

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da Silva, L. M. L., F. da C. Silva, A. L. de Carvalho, et al. "Influence of the Percentage of TiO2 Doped into SiO2 Matrix on Photocatalysis." ISRN Nanomaterials 2012 (September 25, 2012): 1–6. http://dx.doi.org/10.5402/2012/304546.

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The sol-gel process was employed in the preparation of titania-doped spherical nanosilica for application in photocatalysis. To this end, the silica matrix was doped with 1 and 10% titania, and the catalytic activity of the resulting solids in the degradation of rhodamine was tested. The synthesized materials were thermally treated at 120, 400, and 800°C. Differential thermal analysis did not evidence the titania-phase transition from anatase to rutile. Scanning electron microscopy revealed the formation of monodisperse spherical nanoparticles with sizes varying between 400 and 500 nm. The UV-

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Sanjaya, Hary. "DEGRADASI METHYLENE BLUE MENGGUNAKAN KATALIS ZnO-PEG DENGAN METODE FOTOSONOLISIS." EKSAKTA: Berkala Ilmiah Bidang MIPA 18, no. 02 (2017): 21–29. http://dx.doi.org/10.24036/eksakta/vol18-iss02/45.

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Study about degradation of methylene blue using photosonolysis method has been done. This research aims to investigate effect of variation radiation times, pH, and concentrations doping PEG (polyethylene glycol). The absorbance of samples was measured by a UV-Vis spectrophotometer. The result showed maximum time of irradiation to degradate methylene blue at 120 minutes, with percentage degradation is 94.55%. The effect of pH showed maximum pH at 7 with percentage degradation is 96,83%. Meanwhile, the effect of variation concentration doping PEG showed maximum result at ZnO-PEG 15%, with percen

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Ariski, Muhammad Gani, Hary Sanjaya, Alizar Alizar, Deski Beri, and Yohandri Yohandri. "Degradation of Methyl Green Dyes with ZnO Catalyst using the Photosonolysis Method." Jurnal Periodic Jurusan Kimia UNP 11, no. 2 (2022): 6. http://dx.doi.org/10.24036/p.v11i2.113614.

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Textile and dyestuff industrial dye waste remain the most difficult wastewater to treat due to the complex aromatic molecular structure of industrial dyes, which are very difficult to decompose. This research was conducted on the degradation of methyl green using the photosonolysis method. The purpose of this study was to determine the optimum time and amount of ZnO used in degrading methyl green dye. The results of the percentage degradation were obtained from the absorbance value measured using a UV-Vis Spectrophotometer. (λmax) Methyl green obtained from the measurement of a UV-Vis spectrop

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ISHIKAWA, Nao, Yunosuke OSANAI, Yuki SATO, et al. "SULFAMETHAZINE SORPTION, DEGRADATION, AND THE PERCENTAGE OF SULFAMETHAZINE DEGRADATION PRODUCTS IN SOLID, LIQUID, AND GAS PHASES IN SOIL." Journal of JSCE 12, no. 1 (2024): n/a. http://dx.doi.org/10.2208/journalofjsce.24-00079.

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Ardani, Aliefia Miftakhul, Wahyu Dwi Saputri, Abdus Salam Junaedi, and Haryo Triajie. "Application of Indigenous Bacterial Formulation of Salt-Washing Wastewater (Bittern) in Degrading Plastic Waste." Airlangga Journal of Innovation Management 5, no. 4 (2024): 705–20. https://doi.org/10.20473/ajim.v5i4.65189.

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The accumulation of plastic waste can lead to environmental changes. One solution to reduce plastic waste is through a biodegradation process involving microorganisms or bacteria. One solution is biodegradation by using microorganisms or bacteria to break down plastic. Biodegradation is a solution to reduce plastic numbers with the help of microorganisms or bacteria. This study aims to measure the Optical Density (OD), Total Plate Count (TPC), and degradation effectiveness of indigenous bacteria from salt wash wastewater (bittern) in degrading plastic on Nutrient Broth (NB) media with 1% gluco

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Carboué, Quentin, Sami Fadlallah, Yasmine Werghi, et al. "Impact of Bis-O-dihydroferuloyl-1,4-butanediol Content on the Chemical, Enzymatic and Fungal Degradation Processes of Poly(3-hydroxybutyrate)." Polymers 14, no. 8 (2022): 1564. http://dx.doi.org/10.3390/polym14081564.

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Poly-β-hydroxybutyrate (PHB) is a very common bio-based and biocompatible polymer obtained from the fermentation of soil bacteria. Due to its important crystallinity, PHB is extremely brittle in nature, which results in poor mechanical properties with low extension at the break. To overcome these issues, the crystallinity of PHB can be reduced by blending with plasticizers such as ferulic acid derivatives, e.g., bis-O-dihydroferuloyl-1,4-butanediol (BDF). The degradation potential of polymer blends of PHB containing various percentages (0, 5, 10, 20, and 40 w%) of BDF was investigated through

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Firmasari, Firmasari, Ni Ketut Sumarni, Ruslan, and Hardi Ys. "PERSEN DEGRADASI EKSTRAK ETANOL KELOPAK BUNGA ROSELLA (Hibiscus sabdariffa L.) SELAMA PENYIMPANAN THE PERCENTAGE OF ETHANOL EXTRACTS OF ROSELLE PETALS (Hibiscus sabdariffa L.) DURING STORAGE." KOVALEN: Jurnal Riset Kimia 5, no. 2 (2019): 132–38. http://dx.doi.org/10.22487/kovalen.2019.v5.i2.9970.

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Ethanol extract of roselle petals (Hibiscus sabdariffa L.) is more stable in low pH than in high pH. The research aims to monitor and determine the effect of ratio content in ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce and the pH effect on the percentage of ethanol extract degradation during storage. Two independent variables implemented in this study, are ratio content of ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce and pH. Ethanol extract of roselle petals (Hibiscus sabdariffa L.) in tomato sauce with ratio content 0,5:1; 1:1; and

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Zheng, Zhe, Yousheng Huang, Liping Liu, Yi Chen, Yuanxing Wang, and Chang Li. "Zearalenone Degradation by Dielectric Barrier Discharge Cold Plasma: The Kinetics and Mechanism." Foods 11, no. 10 (2022): 1494. http://dx.doi.org/10.3390/foods11101494.

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In this study, dielectric barrier discharge (DBD) cold plasma was used to degrade zearalenone and the efficiency of degradation were evaluated. In addition, the degradation kinetics and possible pathway of degradation were investigated. The results showed that zearalenone degradation percentage increased with increasing voltage and time. When it was treated at 50 KV for 120 s, the degradation percentage could reach 98.28%. Kinetics analysis showed that the degradation process followed a first-order reaction, which fitted the exponential function model best (R² = 0.987). Meanwhile, liquid chrom

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Anjali, Ghoury Kharisma, and Rahadian Zainul. "Fotokatalis Titanium Oksida (TiO2) Doping Tembaga (Cu) Menggunakan Metode Sol Gel untuk Fototransformasi Zat Warna Methylene Blue." MASALIQ 4, no. 1 (2024): 285–93. http://dx.doi.org/10.58578/masaliq.v4i1.2475.

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Methylene blue is a heterocyclic synthetic dye used in the textile industry, but it has a negative impact on water quality and the surrounding environment. This research aims to degrade Methylene blue using a photocatalytic method. The catalyst used for degradation is TiO2 doped with 10% Cu. In this research, the degradation process uses 25 watt Uv light using a reactor. The degradation process was carried out by varying stirring at a speed of 1500 rpm and without stirring at 30, 60, 90 and 120 minutes. The degradation results were measured using a UV-Vis spectrophotometer to see the absorbanc

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Asim, Noreen, Mahreen Hassan, Farheen Shafique, et al. "Characterizations of novel pesticide-degrading bacterial strains from industrial wastes found in the industrial cities of Pakistan and their biodegradation potential." PeerJ 9 (October 5, 2021): e12211. http://dx.doi.org/10.7717/peerj.12211.

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Background Lack of infrastructure for disposal of effluents in industries leads to severe pollution of natural resources in developing countries. These pollutants accompanied by solid waste are equally hazardous to biological growth. Natural attenuation of these pollutants was evidenced that involved degradation by native microbial communities. The current study encompasses the isolation of pesticide-degrading bacteria from the vicinity of pesticide manufacturing industries. Methods The isolation and identification of biodegrading microbes was done. An enrichment culture technique was used to

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Asim, Noreen, Mahreen Hassan, Farheen Shafique, et al. "Characterizations of novel pesticide-degrading bacterial strains from industrial wastes found in the industrial cities of Pakistan and their biodegradation potential." PeerJ 9 (October 5, 2021): e12211. http://dx.doi.org/10.7717/peerj.12211.

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Background Lack of infrastructure for disposal of effluents in industries leads to severe pollution of natural resources in developing countries. These pollutants accompanied by solid waste are equally hazardous to biological growth. Natural attenuation of these pollutants was evidenced that involved degradation by native microbial communities. The current study encompasses the isolation of pesticide-degrading bacteria from the vicinity of pesticide manufacturing industries. Methods The isolation and identification of biodegrading microbes was done. An enrichment culture technique was used to

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Chen, Wei-Sheng, Ming-Hong Wu, and Jun-Yi Wu. "Effects of Tb-Doped BiVO4 on Degradation of Methylene Blue." Sustainability 15, no. 8 (2023): 6994. http://dx.doi.org/10.3390/su15086994.

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Bismuth vanadate (BiVO4) is a narrow-bandgap semiconductor (~2.41 Ev) that responds to visible light. The efficiency of degradation of organic dyes is indexed by methylene blue (MB). After 150 min, the efficiency of MB degradation by pure BiVO4 was about 20%. Its adsorption performance and electron–hole pair migration ability are weak, and the photocatalytic activity of pure BiVO4 needs to be improved. BiVO4 doped with rare earth ions can facilitate the separation of photogenerated electron–hole pairs, thereby enhancing photocatalytic activity in the visible light range. This study investigate

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Chen, Xia, Renzheng Jiang, Jun Wang, et al. "Sonocatalytic degradation of organic dyes and influence of Al2O3, Y2O3 and Fe2O3 on catalytic activity of TiO2 under ultrasonic irradiation." Water Science and Technology 63, no. 7 (2011): 1513–18. http://dx.doi.org/10.2166/wst.2011.407.

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In order to improve the sonocatalytic activity of TiO2, Al2O3/TiO2, Y2O3/TiO2 and Fe2O3/TiO2 composites were prepared using mechanical mixing, liquid boiling, ultrasonic dispersion and heat-treated methods. And then, a series of degradation experiments were carried out under ultrasonic irradiation. Also, the influences of heat-treated temperature and heat-treated time on the sonocatalytic activity of Al2O3/TiO2, Y2O3/TiO2 and Fe2O3/TiO2, and ultrasonic irradiation time and solution acidity on the sonocatalytic degradation of Acid red B were investigated by UV-vis spectra. It was found that the

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Hu, Xiao Dan, Hai Qian Zhang, and Dong Mei Cao. "Synthesis of Fe₃O₄ Nanocrystals and Application in Photocatalytic Degradation of Levofloxacin Lactate." Materials Science Forum 688 (June 2011): 376–82. http://dx.doi.org/10.4028/www.scientific.net/msf.688.376.

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Fe3O4nanocrystals were synthesized with polyethylene glycol (PEG) and polyvinyl pyrrolidone (PVP) as dispersant respectively by solvothermal process. The nanocrystals were characterized in order to elucidate the morphology and structure by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) respectively. The results indicated that Fe3O4 nanocrystals were cubic phases, and the morphologies of samples were globular nanoparticles structure no matter what dispersant was. The photocatalytic degradation of levofloxacin lactate (LVFX) rev

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Safni, Maizatisna, Zulfarman, and T. Sakai. "DEGRADASI ZAT WARNA NAPHTOL BLUE BLACK SECARA SONOLISIS DAN FOTOLISIS DENGAN PENAMBAHAN TIO2-ANATASE." Jurnal Riset Kimia 1, no. 1 (2015): 43. http://dx.doi.org/10.25077/jrk.v1i1.66.

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ABSTRACTDegradation of naphtol blue black dye had been done by sonolysis and photolysis with adding anatase-TiO2. Sonolysis method were performed using an ultrasound with frequency 45 kHz, and photolysis using an irradiation of UV light l= 359 nm. The optimum condition for degradation of 6 mg/L naphtol blue black by sonolysis with addition of 0.1000 g anatase-TiO2 were found at pH = 3.0 and temperature 30 ± 1°C. Percentage of degradation at pH and temperature optimum was 65.20% within 120 minutes treatment. Degradation of 6 mg/L naphtol blue black by photolysis with addition of 0.1000 g anatas

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Abdelrahman Elsheikh, Malik Abdalla. "Kinetics Study of Carbaryl Degradation in Squash and Cucumber Fruits." Journal of Physical Science 35, no. 2 (2024): 1–17. http://dx.doi.org/10.21315/jps2024.35.2.1.

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In this study, residual levels of carbaryl insecticides were determined in squash (summer squash, ronde de nice) and cucumber (C. sativus) fruits using spectrophotometry. The degradation rate, degradation percentage, half-life and activation energy of carbaryl degradation were calculated. The degradation reaction of the carbaryl was found to follow first-order reaction kinetics. The half-lifetimes (t1/2) ranged between 2.18 and 2.32 days, and the activation energies (Ea) of carbaryl degradation for squash and cucumber samples were 10.34 kcal/mole and 8.95 kcal/ mole respectively. The degradati

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Zilfa, Z., Wilda Putri Suhada, and Rahmiana Zein. "Penggunaan ZnO/Zeolit dalam Degradasi Fenol Secara Fotolisis dan Aplikasinya Pada Limbah Karet." Jurnal Kimia Unand 12, no. 2 (2023): 19–26. http://dx.doi.org/10.25077/jku.12.2.19-26.2023.

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Phenol is one of the organic compounds that are toxic and carcinogenic. In this study ZnO/zeolite was used to degrade phenol by photolysis and its application to rubber waste. Phenol analysis was performed using a UV-Vis spectrophotometer and Fourier Transform Infrared (FTIR), while the ZnO/zeolite characterization used FTIR and X-Ray Diffraction (XRD). The results showed that the percentage of phenol degradation without a catalyst was 15.79% with UV irradiation for 75 minutes and increased to 79.63% with the addition of 0.4 g ZnO/zeolite. Phenol degradation in rubber wastewater samples using

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Li, Yunfei, Yulia Liem, Zaitunnatakhin Zamli, et al. "Subchondral Bone Microarchitectural and Mineral Properties and Expression of Key Degradative Proteinases by Chondrocytes in Human Hip Osteoarthritis." Biomedicines 9, no. 11 (2021): 1593. http://dx.doi.org/10.3390/biomedicines9111593.

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Background: The purpose of this study was to investigate the relationship between the expression of key degradative enzymes by chondrocytes and the microarchitectural and mineral properties of subchondral bone across different stages of cartilage degradation in human hip osteoarthritis (OA). Methods: Osteochondral samples at different stages of cartilage degradation were collected from 16 femoral heads with OA. Osteochondral samples with normal cartilage were collected from seven femoral heads with osteoporosis. Microcomputed tomography was used for the investigation of subchondral bone microa

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Ulya, L. H., A. P. Setiawan, I. A. E. Setyaputra, and Maghfiroh. "Enhanced Photocatalytic Degradation Activity of Methyl Violet Dyes Utilizing TiO₂/Natural Zeolite Composite." IOP Conference Series: Earth and Environmental Science 1439, no. 1 (2025): 012030. https://doi.org/10.1088/1755-1315/1439/1/012030.

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Abstract For boosting the degradation activity of methyl violet employing photocatalyst, titanium dioxide modified by natural zeolite (TNZ) was successfully produced by sonication method. TiO2 is a photocatalyst that can be used to degrade methyl violet. TNZ was characterized using XRD to determine crystal structure, XRF to determine the elemental composition, and Spectrophotometer UV-Vis/DRS to determine band gap energy and absorbance in the long wavelength region. Furthermore, TNZ was examined its photodegradation activity, including the effect of irradiation time, optimum catalyst mass, and

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Jornada, Tiago da Silva, Camila Hitomi Murata, and Regina Bitelli Medeiros. "Influence of partial k-space filling on the quality of magnetic resonance images." Radiologia Brasileira 49, no. 3 (2016): 158–64. http://dx.doi.org/10.1590/0100-3984.2015.0028.

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Abstract Objective: To study the influence that the scan percentage tool used in partial k-space acquisition has on the quality of images obtained with magnetic resonance imaging equipment. Materials and Methods: A Philips 1.5 T magnetic resonance imaging scanner was used in order to obtain phantom images for quality control tests and images of the knee of an adult male. Results: There were no significant variations in the uniformity and signal-to-noise ratios with the phantom images. However, analysis of the high-contrast spatial resolution revealed significant degradation when scan percentag

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Ubani, Onyedikachi, Obiefuna Genevieve Onyinye, Bright Obidinma Uba, Chinweike Unoma Dokubo, Mere Chinenye Azuka, and Ifeanyi Patience Akaun. "Kinetic modelling and half-life study on bioremediation of diesel oil contaminated soil and water using nano remediation strategy." Multidisciplinary Science Journal 7, no. 5 (2024): 2025182. http://dx.doi.org/10.31893/multiscience.2025182.

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The study described the kinetic modelling and half-life study on bioremediation of engine oil contaminated soil and water using nano - remediation strategy. In this study, bioremediation process was carried out in diesel oil hydrocarbon polluted water and soil using green nano scaled silver particles (AgNPs) which were synthesized from seed extract of Moringa oleifera under ambient conditions. The synthesis of silver nanoparticles was confirmed by systematic characterization using Fourier transform infrared spectroscopy, UV-spectroscopy, Xray diffraction analysis and Scanning electron microsco

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Nascimento, Graziele Elisandra do, Marcos André Soares Oliveira, Rayany Magali da Rocha Santana, et al. "Investigation of paracetamol degradation using LED and UV-C photo-reactors." Water Science and Technology 81, no. 12 (2020): 2545–58. http://dx.doi.org/10.2166/wst.2020.310.

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Abstract This work investigates the efficiency of LED and UV-C photo-reactors for paracetamol degradation using advanced oxidative processes. Among the evaluated processes, photo-Fenton was the most efficient for both radiations. Degradations greater than 81% (λ 197 nm) and 91% (λ 243 nm) were obtained in the kinetic study. These degradations were also observed by means of the reduction in the peaks in both spectral scanning and high-performance liquid chromatography analysis. The good fit of the Chan and Chu kinetic model shows that the degradation reaction has pseudo-first order behavior. To

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Branà, Maria Teresa, Lucrezia Sergio, Miriam Haidukowski, Antonio F. Logrieco, and Claudio Altomare. "Degradation of Aflatoxin B1 by a Sustainable Enzymatic Extract from Spent Mushroom Substrate of Pleurotus eryngii." Toxins 12, no. 1 (2020): 49. http://dx.doi.org/10.3390/toxins12010049.

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Ligninolytic enzymes from white-rot fungi, such as laccase (Lac) and Mn-peroxidase (MnP), are able to degrade aflatoxin B1 (AFB1), the most harmful among the known mycotoxins. The high cost of purification of these enzymes has limited their implementation into practical technologies. Every year, tons of spent mushroom substrate (SMS) are produced as a by-product of edible mushroom cultivation, such as Pleurotus spp., and disposed at a cost for farmers. SMS may still bea source of ligninolytic enzymes useful for AFB1 degradation. The in vitro AFB1-degradative activity of an SMS crude extract (S

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Bijang, Catherina M., M. Nurdin, Jolantje Latupeirissa, Thamrin Aziz, and Firda Talapessy. "The Ouw Natural Clay Impregnation Using Titanium Dioxide as a Rhodamine B Dyestuff Degrader." Indo. J. Chem. Res. 9, no. 3 (2021): 144–49. http://dx.doi.org/10.30598//ijcr.2022.9-cat.

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This study aims to determine the effect of calcination temperature on Titanium dioxide impregnated Ouw Natural Clay (LAO) on the degradation of Rhodamine B dye. The calcination temperature used was 200, 300, and 400 °C. Their radiation was carried out with 3x8 watt UV lamps and sunlight. The degradation percentage of Rhodamine B dye produced by LAO-TiO2 calcined at a temperature of 200, 300, and 400 °C with sunlight were 98.80%, 98.87%, and 96.07%, respectively. The degradation percentage of Rhodamine B dye produced by LAO-TiO2 calcined at temperatures of 200, 300, and 400 °C with the help of

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Donanita, Tysa, Safni Safni, and Suryati Suryati. "Analysis of Water-Soluble Vitamin Change in Tomato (S.lycopersicum) Due to Ozonolysis of Imidacloprid Degradation Treatment by Using Spectrometry and HPLC Method." Jurnal Akademika Kimia 12, no. 2 (2023): 92–99. http://dx.doi.org/10.22487/j24775185.2023.v12.i2.pp92-99.

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In this study, the effect of imidacloprid degradation on the reduction of water-soluble vitamins in tomatoes was observed, such as ascorbic acid, pyridoxine, niacin, and thiamine. Analysis was carried out using a spectrophotometer and high-performance liquid chromatography. Degradation method with ozone water for 15 minutes showed a better result than the ozonolysis method because the decrease in levels of water-soluble vitamins is smaller. The percentage decrease of each water-soluble vitamin in ozone water method is ascorbic acid by 17,103%, pyridoxine by 6,723%, niacin by 2,781%, and thiami

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Sakti, Anjar Dimara, Adam Irwansyah Fauzi, Felia Niwan Wilwatikta, et al. "Multi-Source Remote Sensing Data Product Analysis: Investigating Anthropogenic and Naturogenic Impacts on Mangroves in Southeast Asia." Remote Sensing 12, no. 17 (2020): 2720. http://dx.doi.org/10.3390/rs12172720.

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This study investigated the drivers of degradation in Southeast Asian mangroves through multi-source remote sensing data products. The degradation drivers that affect approximately half of this area are unidentified; therefore, naturogenic and anthropogenic impacts on these mangroves were studied. Various global land cover (GLC) products were harmonized and examined to identify major anthropogenic changes affecting mangrove habitats. To investigate the naturogenic factors, the impact of the water balance was evaluated using the Normalized Difference Vegetation Index (NDVI), and evapotranspirat

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Chinenye, Nna. "Evaluation of Percentage Degradation of Crude Oil in Contaminated Soil by Isolated Consortia." Journal of Advances in Microbiology 10, no. 3 (2018): 1–9. http://dx.doi.org/10.9734/jamb/2018/37928.

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Guo, Yunlong, Valeri Markine, Weile Qiang, Hui Zhang, and Guoqing Jing. "Effects of crumb rubber size and percentage on degradation reduction of railway ballast." Construction and Building Materials 212 (July 2019): 210–24. http://dx.doi.org/10.1016/j.conbuildmat.2019.03.315.

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Arévalo, César, David Manya, Victor Wong, et al. "Thermal stability of water fibers: effect of the alkaline treatment - aminopropyltrimetoxysilane [Estabilidad termica de fibras de aguaje: efecto del tratamiento alcalino – aminopropiltrimetoxysilano]." Journal of Sciences and Engineering 4, no. 2 (2020): 44. http://dx.doi.org/10.32829/sej.v4i2.194.

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The present research evaluated the influence of the concentration of sodium hydroxide and aminopropyltrimethoxysilane on the thermal stability of the aguaje fibers. The fibers were extracted by manual immersion in water and subsequent separation by manual pressure. The NaOH concentrations were 5%, 10% and 15% w / v; while in the case of the silane coupling agent they were 1% and 1.5% v / v. The chemically treated fibers together with the control samples were subjected to thermogravimetric analysis evaluation, in addition, the variation of the humidity percentage, the chemical variation of the

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